In geometry, **area** is the 2-dimensional space or region occupied by a closed figure, while **perimeter** is the distance around a closed figure i.e. the length of the boundary. For example, the area can be used to calculate the size of the carpet to cover the whole floor of a room. Perimeter can be used to calculate the length of fence required to surround a yard or garden. Two shapes may have the same perimeter, but different areas or may have the same area, but different perimeters.

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## Contents: Area vs Perimeter

## edit Measurement and Units

Area represents a two-dimensional region; so the unit for area is "square units". e.g. 24 inches squared or 20 centimeters squared. This is written as *20 cm ^{2}*.

We use linear units when we measure perimeter. Linear units measure one dimension, length.

## edit Formulas to calculate area and perimeter

## edit Irregular Objects

An irregular shape has sides of different length. Calculating area on these shapes involves breaking the shape down into common shapes like squares, rectangles, triangles and circles. This is because these shapes all have set formulas for calculating their area. Being able to see the shapes within shapes is the key to calculating the area of irregular shapes. After finding the area of each shape add them to get the total area. In the case of perimeter of irregular object just measure the length of each side and add them up.

## edit References

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